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Difficulty: MediumPreoperative and Postoperative Care

Following a left total knee arthroplasty 4848 hours ago, a 7575-year-old man develops progressively worsening shortness of breath. His medical history includes severe chronic obstructive pulmonary disease, hypertension, and a myocardial infarction 44 years prior. During the intraoperative and immediate postoperative periods, he received a total of 3.53.5 L of intravenous crystalloid solution. Vital signs reveal a temperature of 38.1∘C38.1^\circ\text{C} (100.6∘F100.6^\circ\text{F}), a blood pressure of 162/94162/94 mm Hg, a pulse of 114114/min, and a respiratory rate of 2626/min. Pulse oximetry demonstrates an oxygen saturation of 88%88\% on room air. Physical examination shows visible engorgement of the jugular veins while sitting at a 45∘45^\circ angle. Lung auscultation is notable for bilateral crackles in the lower and middle lung fields, along with scattered expiratory wheezes. He is coughing up pink-tinged, frothy sputum. The surgical site appears clean and intact without any signs of infection. Which of the following is the most appropriate initial step in management?

  1. Administration of intravenous furosemideAnswer
  2. B
    Administration of systemic corticosteroids and inhaled bronchodilators
  3. C
    Initiation of empiric broad-spectrum intravenous antibiotics
  4. D
    Collection of blood and urine cultures
  5. E
    Lower extremity venous duplex ultrasonography

Answer

The most appropriate initial step in management is the administration of intravenous furosemide to treat acute decompensated heart failure.
The correct answer is the administration of intravenous furosemide. This patient exhibits classic signs of acute decompensated heart failure (ADHF) leading to cardiogenic pulmonary edema, triggered by the large volume of crystalloid fluids administered during and after his surgery. Given his history of a myocardial infarction, his left ventricle is likely unable to handle the increased preload. The presence of jugular venous distension, bilateral crackles, and pink frothy sputum distinguishes this from other causes of postoperative dyspnea. Immediate preload reduction with intravenous loop diuretics is the standard of care.

Step-by-Step Solution

1
Analyze the patient's presentation and timeline.
The patient presents with acute respiratory distress, hypoxia, and a low-grade fever on postoperative day 22 following significant perioperative fluid administration.
Establishing the timeline and recognizing iatrogenic fluid loading is crucial for diagnosing postoperative complications.
2
Interpret the physical examination findings.
Jugular venous distension, bilateral crackles, and pink frothy sputum indicate fluid overload and cardiogenic pulmonary edema, while wheezing represents 'cardiac asthma'.
Differentiating between cardiac and pulmonary causes of dyspnea relies heavily on classic signs of volume overload.
3
Determine the most appropriate initial management.
Administration of a loop diuretic (intravenous furosemide) is selected.
Intravenous loop diuretics rapidly decrease preload and intravascular volume, which is the immediate life-saving intervention required for acute decompensated heart failure.

Key Concept

Patients with underlying cardiac disease who receive large volumes of perioperative intravenous fluids are at high risk for acute decompensated heart failure, which presents with jugular venous distension, crackles, and hypoxia, requiring immediate treatment with intravenous loop diuretics.
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Topics

Preoperative and Postoperative Care

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